Thread-testing machine



3 Sheets-Sheet J.

P. PAUME THREAD TESTING MACHINE Filed May 24, 1921' June 17, 1924.

Pa a me' June 17 1924.

P. PAUME THREAD TESTING MACHINE F l y 24, 1921 3 Sheets-Sheet 2 45 FIG. 5.

June 17, 1924.

P. PAUME THREAD TESTING MACHINE Filed May 24 1921 3 Sheets-Sheet. 3

FIGS.

Patented June 17, 1924.

UNITED STATES PATENT OFFICE.

PAUL PAUME, OF MILAN, ITALY.

THREAD-TESTING- MACHIN'E. 7

Application filed May 24, 1921. Serial no. 472,070.

T 0 all whom it may concern:

Be it known that I, PAUL PAUME, a citi- Zen of the French Republic, of 4: Via Giuseppe, Verdi, Milan, Italy, have invented certain new and useful Improvements in Thread-Testing Machines, of whichthe following is a specification.

The present invention relates to a machine for testing the warp threads for fabrics of all kinds and particularly silk threads, the machine While working similarly to a loom at the same time tests the strength,'elasticity, regularity and aggregation of the strands or threads.

In order that the use of the machine may be clearly understood I will describe it in conjunction with a warp mill in which the threads to be tested are first laid, said warp mill however forms no part of my invention proper.

In the annexed drawings Fig. 1 is a front view of the warp mill.

Fig. 2 is a side view thereof.

Fig. 3 is a plan view.

Fig. 4 is a front view.

Fig. 5 a side view and Fig. 6 a plan view of the thread testing machine.

Figs. 7 and 8 are detail views respectively of the front and of the side of a brake of the testing machine.

The warp-mill is essentially constituted of two supports 1, 2 of cast iron connected together by iron stays 3, 4, 5, 6. (Figs. 1 and 2.) Between the upper part of the support is arranged the roller 7 rotatable in bearings 8, 9, and actuated by hand by means of a hand wheel 10.

The threads pass onto the roller 7 with the aid of a comb 11 with fan-shaped articue lation, capable of moving longitudinally by means of a carriage .12 having rollers 12, .12" sliding on the rods 13, 14:. The object of this device is to mount rapidly warps composed of several thousands of threads stopped at their ends by spring bars.

The roller 7 with the warps inserted is subsequently transferred from the warp-mill to the thread testing machine or loom.

The thread testing machine or loom is constituted of two cast iron supports 17, 18 connected together by cross members 19, 20, 21, 22 (Figs. 4, 5, 6).

To the ends of the supports are fixed in bearings two rollers, 23, 24:. The roller 23 is transported from the warp-mill after the of the healds.

winding of the warp: it is provided with a shoe brake 25 (Figs. 7 and 8) formed of a group of levers connected towooden shoes 26, 27 covered with bands of brass or other metal. A graduated lever 28 with a counter weight 28 serves'to adjust the tension to be given to the brake according to the normal resistance standard of the warp threads. To verify the elasticity of the thread the loom is provided with a series of parallel vertical rods 29 terminated at their upper part by a fork-shaped support 29. At their lower part these rods are each'articulated to a lever 35 pivoting rounda fixed axis 35. ,The different levers 35 can each pivot round their axis under the action of an eccentric 30. All the eccentrics are mounted on a common axle 31 supported by two bearings 31" which can be moved forwards or backwards along two slides34c by means ofa hand-fly wheel 33 and a device of transmis sion by screws and worm-wheels, or by gearings, or in anyother manner. The object of the displacement of the axle 31 and, consequently, of the eccentrics 30 is, by vary ing the point of attack of the said eccentrics, to modify the extent of oscillation of the levers 35 and, consequently, the ascent and descent of the rods 29. A spring 36 inserted between a fixed support 36 and the levers 35 tends to hold the latter in their lowest position.

y The shaft 31 having a rotatory movement imparted to it by pulley and belt, the eccentrics 30 cause the levers 35 to oscillate regu larly round their, pivot 35, and the rods 29 rise and descend, drawing along the silk threads placed on the forks 29'. i This: movement ofthe silk thread to be tested corresponds to the courseof the warpthreads in a weaving-loom under the action It therefore is subjected to a tension equal to that to which it is subjected on the loom. From the number of breakages of threads in a given time is ascertained the degree of elasticity of the thread and its resistance to tension.

The apparatus is also provided with a device reproducing the effects which the threads are submitted to when passing the harness and the comb giving thus the means for estimatingthe resistance of the threads to friction and the degree of aggregation of the strands. This device is formed by two cylindrical bars of steel 37, 38 capable of moving forwards and backwards and pararticulated two arms 89, 40 connected together by the rods 37, 38 so as to form an articulated parallelogram. On the bar 18 of the frame is fixed an abutment 41 forming an inclined plane the joint 55 connecting the arm 39 and the rod 37 hearing constantly on this inclined plane for example by means of a sinallspring connecting the joint of the rod 38 and of the arm 40. to the adjacent slide 42. It is evident that the I to and fro movement of the slide 42 imparts a similar movement to the rods 3'7 and 38 and also has the effect of displacing said rods in the direction of the arrows since the joint 55 rides up and down on the inclined plane 41 during the movement of the slides. The chain 45 passes over the toothed Wheels 46, 47: to regulate the tension of this chain in case of Variations of elevation of the levers 29 a tensioning wheel 48 is provided turning on the upright 48 of the 100m frame. The threads from the roller 23 pass over the upper ends 29 of the lovers 29 in several warps, then pass through the bars 37, 28 and are wound on the roller 24. The

principal movement is given to the apparatus by the pulley 49 and is transmitted with the reductions of speed according to the tests to be made to the roller 24 which isrotated so as to draw the threads by means of helicoidal gear 54 and connected by the shaft 51 to a couple of conical gear wheels 52 which transmit the movement to the rollers 24 by the small shaft 58 and the helicoidal gear 54.

The connection between the shafts 31 and 51 is shown in Figs. 4 and 5. The shaft 51 carries at its 'end a worm 51 which gears with a helicoidal wheel 31 keyed on the shaft 31. I

The number of breakages resulting from these simultaneous operations will indicate the degre ofresistance of the threads tested.

YVhat- I claim as my invention and desire to secure by Letters Patent of the United States is 1. In a machine of the character described the combination of a framing, two sets of bearings mounted one at each end of said framing, one of said sets being adapted to receive a roller, a second recessed roller mounted in the other of said sets the threads being stretched between said rollers means for rotating said rollers, means for braking said first mentioned roller, means for adjusting the braking pressure, a series of vertical levers arranged between said rollers and upon which said threads bear, means for imparting vertical movement to said levers, means for varying the elevation of said levers, two cylindrical bars rotatably mounted on said framing for gauging the resistance of said threads to friction and between which the threads are passed and means for imparting simultaneous longitudinal and transversal movement to said bars.

2. In a machine of the character described the combination of a framing, two sets of bearings mounted one at each end of said framing one of said sets being adapted to receive a roller, a second recessed roller mounted in the other of said sets, the threads being stretched between said rollers, means for rotating said rollers, means for braking said first mentioned roller, means for adjusting the braking pressure, a series of vertical levers arranged between said rollers and upon which said threadsbear, a rotatable shaft, eccentrics mounted on said shaft upon which said vertical levers bear, movable bearings supporting said shaft, means for moving said bearings, cylindrical bars, slides supporting said bars, an inclined plane and means for moving said bars longitudinally in said slides and over said inclined plane.

In witness whereof I have signed this specification in the presence of two witnesses.

PAUL PAUME.

Witnesses JEAN GERMAIN, GUiLLAUME PIOOHIL. 

